Side cutter for trenching machines



R. BROWN SIDE CUTTER FOR TRENCHING MACHINES Dec.`18 1923.

FiledApIil 12, 1923 2 Sheets-Sheet 1 Dec. 18 ,1923.

R. BROWN SIDE CUTTER FOR TRENCHING MACHINES Filed April 12. 1923 2 Sheets-She't 2 Patented @en 'l-, 19235.

D Sith/351th a?, a at: tra man f i 1r ai a ci itl i'.

ROBERT BROVN, DF NEWTON, IOA, SSIGNOR EO THE ?ARSONS CGMPANY, 0F

NE'WTON, IONA.

Application ledi'April 12, 1923. Serial' No. 631,616.

To all whom t may concern Be it known that 1, Roemer BROWN, a cit-- izen of the TJnited States. and a resident of Newton, in the county of Jasper and State 04T' Iowa, have invented a certain new and useful Side Cutter for 'llrenching llachines, of which the following is a specification.

My invention relates to trenching machines and more particularly to a structure for cutting the sides of a ditch or trench for lmaking a wider cut than can be done with the regular equipment of the machine.

A further object is to provide such-a structure, which can be used in connection with the reaular ditching mechanism as an attachment or otherwise and may be removed from the machine, when it is not desired to cut so Wide a. ditch.

A further object is to provide insuch a side cutting structure novel cutting members.

lVith these and other objects in view, my invention consists in the construction, arrangement and combination of the various parts ot my device, whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out'in my claims, and illustrated in the accompanying drawings, in which:

Figure 1 shows a side elevation of a, trenching machine having a side 'cutting structure embodying my invention.

Figure 2 shows a top orplan viewV of the boom and side slitting structure.

Figure 3 shows a transverse, detail, sec tional view, somewhat enlarged, taken on the line 3`3 of Figure 2.

Y Figure 4 shows a detail, sectional view taken on the-line 4*4 of Figure. 2. i

Figure 5 shows a detail. sectional view taken on the line 5-5 of Figure 4.

Figure 6 shows a. sectional view taken on the line 6`6 of lFigure 2; and

Fig-ure 7 shows a transverse, sectional view taken on the line 7-7 of Figure 6.

1n the accompanying drawings, I have used the reference numeral 10 to indicate generally the main frame of my improved trenching machine, having the front sunporting wheels 11 and the ri-ar traction devices 12, which may be of the endless tread type.

Mounted on the frame is a power plant 13.

At the rear of the trame is a transverse, driving shaft 14 operated trom the power y sleeves 29,

plant through suitable mechanism 15.

The boom 1G, which carries the digging mechanism, has at its upper end biturcatet arms 17a., pivotedon the shaft 14, shown in Figure 2.

On the upper side 0f the boom 16 are brackets 17, which support sleeves 18 in which are mounted shafts 19 on which are additional guide pulleys 20 for the chains 21 of the regular digging mechanism.

These chains carry the buckets 22, which are the'reg'ular equipment of my trenchinpi machine. Y

Mounted on the underside of the boom 16 is a series of sleeves 23. lVhen the side cutter attachment. is used, shafts 24 are mounted in the sleeves 28.

-Rotatably mounted near the outer ends of the shafts 24 are spidens or the like 25, which have hubs 26 ot the sleeves 23.

Detachably connected with the hubs 2G by means of bolts 27 are sprocket wheels 28. 0n the outer ends of the shafts 24 are mounted sleeves 29 which may be4 locked'to theshafts by means of set screws 30 or other gearing means, and which have at their outei` ends Opposite arms 31 inclined away from the as shown in Figure 4. y Cutter blade supportingbrackets 32 are arranged spaced from the sleeves 29 on opcnds inclined arms 3?) detachably mounted 'on the inclined flange 34 at the periphery of the spider 25.

Each spider 25 has a. drum or the like 35 under which the lower chains 21 travel.

"Detachablymounted on the brackets 32 are the cut-ter blades or teeth 36. At the outer ends of the brackets 32 are arms 37 inclined to position parallel with the brackets 32 and detachably secured thereto by bolt screws or the like.

At the lower end of the boom, the frame `members 3S project therefrom.

receiving the outer ends posite sides thereof, and have at their inner c.

stretches ot the On the outer ends of the shaft 41 are mounted spiders 25, similar to those already described, having the flanges 34. Instead of the drums 35, the last-named spiders have spiocket Wheels 45.

The chains 21 carrying the buckets 22 are extended over sprockets 46 .on the shaft 14 and over the guide rollers 20 and the sprockets 45 and under the drums 35.

On the shaft 14 is a sprocket 4T in line with one of the sprockets 28 on the upper shaft 24 and on the last-described sprocket travels a chain 48. A chain 49 travels on the other sprocket on the upper shaft 24 and the aligned sprocket on the next lower shaft 24. A chain 50 travels on the sprocket at the opposite end of said next lower shaft 24 and over the aligned sprocket 28 on the next shaft 24 below it and so on. In the practical use of my improved inachine, the central part of the ditch is cut and the dirt carried out by the buckets 22, and, if desired, additional cutters mounted on the chains 21.

The sides of the ditch are cut by the cutters 36 and the cutters 52 on the shaft 41.

When the side cutting attachment structure is not employed, shorter shafts are substituted for the shafts 24 and the brackets 32 and the parts supported therefrom are left 0H the machine.

Some changes may be made in the structure and arrangement of the various parts of my improved side cutting structure Without departing from the spirit of my invention, and l desire to cover by my patent, any modified forms of structure or use of inechanical equivalents, which may be reasonaby included AWithin the scope of my claims.A

claim as my invention:

1. In a machine of the class described, a frame, a drive sha ft thereon, a boom pivoted on sai-d drive shaft.` a liournal at the free end of ,the boom, a shaft in said journal, sprockets on said shafts, a chain and bucket excavating mechanism arranged to' travel on said sprockets, a plurality of shafts on said boom, all of said shafts except the drive shaft being removable for substituting other shafts of different lengths, detachable cutter devices on the ends of said plurality of shafts, and means for driving said plurality of shafts successively from the drive shaft and from each other. l

2. In a machine of the class described, a frame, a drive shaft thereon, a boom pivoted on said drive shaft, a journal at the free endv of the boom, a shaft in said journal, sprockets on said shafts, a chain and bucket excavating mechanism arranged to travel on Lair/,cao

said sprockets, a plurality of shafts on said boom, all of said shafts except the drive on said drive shaft, a journal at the free end of the boom, a shaft in said journal, sprockets on said shafts, a chain and bucket excavating mechanism arranged to travel on said sprockets, a plurality of shafts on said boom, detachable cutter devices on the ends of said plurality of shafts, and means for driving said plurality of shafts successively from the drive shaft and from each other.

4. In a machine of the class described, a frame, a drive shaft thereon, a boom pivoted on` said drive shaft, a oui'nal at the free end of the boom. a shaft in said journal, sprockets on said shafts, a chain and bucket excavating spiders, supporting.

mechanism arranged to yitravel on said sprockets, a plurality of shafts on said boom,

detachable cutter devices on the ends of said plurality of shaft-s, comprising spiders, supporting brackets having inclined ends, secured to said spiders, sleeves on the plurality of shafts having inclined arms, arms on the brackets secured to the last arms, and Lcutters f on said brackets.

. In a machine of the class described, a

side cutter structurecomprising a frame ele.

ment, a shaft thereon, a spider on said shaft, a sleeve on said shaft having an inclined arm, a bracket having arms secured to said spider and the arin on the sleeve, and a cutter on said bracket. Y

6. ln a machine of the class described, a

frame, a shaft thereon, a boom pivoted at` llt) 

